From patchwork Sun Jul 21 00:47:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Golle X-Patchwork-Id: 13737933 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EDD8CC3DA49 for ; Sun, 21 Jul 2024 00:48:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:To:From:Date:Reply-To:Cc: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ioAmfF5Ra3TDzOcQy4PGQCqBSr2b3vs30B3nUVx6gQU=; b=n4uWKj/Wf9ShM1nNwErhLU9YSt +zPGUUuBq/dbqn3TG6by4zfRI2U/dDCs96nAm3H8VpxSA7s1xZWX+wYu8CvK1UFOiH4z+tgSas4Yo h78DDBe2Awh4BZX4Ui+gbel9mDBA9qNtIENyIF/FYY+xf2g5a79Vqi9nPPx2MUMdFfPXx3QQ5eDHk 58e5hZ9tqSONkxAcxT5mluqBAXb4FNFBefi/A2q7kZ6CTeFb8XU8S/jLf0rA2KtrNUhh/0u6x++iC uByPNO4DqbR3Qw7HB+lR4QVoznIbUrSWWJ5XPLfPSD/uxXs+qa1bENvLfJzNLKkGk5oGGysNHF4+I vUjTEDpw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sVKk8-00000005vi9-3oO1; Sun, 21 Jul 2024 00:48:04 +0000 Received: from pidgin.makrotopia.org ([2a07:2ec0:3002::65]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sVKja-00000005vZ5-09lb; Sun, 21 Jul 2024 00:47:32 +0000 Received: from local by pidgin.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.98) (envelope-from ) id 1sVKjM-000000007Pp-2MoX; Sun, 21 Jul 2024 00:47:16 +0000 Date: Sun, 21 Jul 2024 01:47:13 +0100 From: Daniel Golle To: Daniel Golle , Aurelien Jarno , Olivia Mackall , Herbert Xu , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Philipp Zabel , Dragan Simic , Uwe =?iso-8859-1?q?Kleine-K=F6nig?= , Sascha Hauer , Cristian Ciocaltea , Martin Kaiser , Francesco Dolcini , Ard Biesheuvel , linux-crypto@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v8 1/3] dt-bindings: rng: Add Rockchip RK3568 TRNG Message-ID: <19c94cbeae8175b8c6f920c3e3029082ade85ae6.1721522430.git.daniel@makrotopia.org> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240720_174730_104780_6EC36AAA X-CRM114-Status: GOOD ( 16.40 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Aurelien Jarno Add the True Random Number Generator on the Rockchip RK3568 SoC. Signed-off-by: Aurelien Jarno Signed-off-by: Daniel Golle Reviewed-by: Krzysztof Kozlowski --- .../bindings/rng/rockchip,rk3568-rng.yaml | 82 +++++++++++++++++++ MAINTAINERS | 6 ++ 2 files changed, 88 insertions(+) create mode 100644 Documentation/devicetree/bindings/rng/rockchip,rk3568-rng.yaml diff --git a/Documentation/devicetree/bindings/rng/rockchip,rk3568-rng.yaml b/Documentation/devicetree/bindings/rng/rockchip,rk3568-rng.yaml new file mode 100644 index 000000000000..383a39e60ad8 --- /dev/null +++ b/Documentation/devicetree/bindings/rng/rockchip,rk3568-rng.yaml @@ -0,0 +1,82 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/rng/rockchip,rk3568-rng.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Rockchip RK3568 TRNG + +description: True Random Number Generator on Rockchip RK3568 SoC + +maintainers: + - Aurelien Jarno + - Daniel Golle + +properties: + compatible: + enum: + - rockchip,rk3568-rng + + reg: + maxItems: 1 + + clocks: + items: + - description: TRNG clock + - description: TRNG AHB clock + + clock-names: + items: + - const: core + - const: ahb + + quality: + $ref: /schemas/types.yaml#/definitions/uint32 + default: 0 + description: + Estimated number of bits of true entropy per 1024 bits read from the rng. + Defaults to zero which causes the kernel's default quality to be used + instead. Note that the default quality is usually zero which disables + using this rng to automatically fill the kernel's entropy pool. + + rockchip,sample-count: + $ref: /schemas/types.yaml#/definitions/uint32 + default: 1000 + description: + Bits to skip on TRNG osc ring output before collection. + The value is a tradeoff between speed and quality, the higher the slower + and the better quality. + + resets: + maxItems: 1 + +required: + - compatible + - reg + - clocks + - clock-names + - quality + - resets + - rockchip,sample-count + +additionalProperties: false + +examples: + - | + #include + bus { + #address-cells = <2>; + #size-cells = <2>; + + rng@fe388000 { + compatible = "rockchip,rk3568-rng"; + reg = <0x0 0xfe388000 0x0 0x4000>; + clocks = <&cru CLK_TRNG_NS>, <&cru HCLK_TRNG_NS>; + clock-names = "core", "ahb"; + quality = <900>; + resets = <&cru SRST_TRNG_NS>; + rockchip,sample-count = <1000>; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index 61053a8c625e..41aecf9736c9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19707,6 +19707,12 @@ F: Documentation/userspace-api/media/v4l/metafmt-rkisp1.rst F: drivers/media/platform/rockchip/rkisp1 F: include/uapi/linux/rkisp1-config.h +ROCKCHIP RK3568 RANDOM NUMBER GENERATOR SUPPORT +M: Daniel Golle +M: Aurelien Jarno +S: Maintained +F: Documentation/devicetree/bindings/rng/rockchip,rk3568-rng.yaml + ROCKCHIP RASTER 2D GRAPHIC ACCELERATION UNIT DRIVER M: Jacob Chen M: Ezequiel Garcia